Electric Furnace Blowing Cold Air And Won T Shut Off

A dirty air filter restricts airflow into your furnace. Set the fan switch to auto to have it cycle with the heat. When overheating your furnace can trip a high limit switch causing the furnace burners to shut off so that the heat exchanger does not crack.

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So change the air filter if it s dirty.

Electric furnace blowing cold air and won t shut off. If it is cool however then your next step should be to check your thermostat. If the furnace blower does not turn off turns off too quickly or not quickly enough as it blows cold air towards the end of the heating cycle then the glitch is possibly a bad temperature control switch. Wait a few minutes then restart. Other heating system problems that can cause a furnace or boiler to refuse to stop are given at heat won t turn off.

Restricted airflow can overheat your furnace causing a safety control to shut off the burners. Your furnace may be blowing cold air because the filter is too dirty. If it is hot then this is not your problem so move on. Your furnace blows hot air but that air quickly turns cold then the furnace shuts off altogether.

This is similar to rebooting your computer to fix a software glitch. Try turning the furnace off via the power switch. If you have a newer furnace with an electronic control panel you may need to reset the system. Is your furnace blowing cold air or not turning on.

The furnace will run constantly to keep up on a cold night. If the furnace still blows cold air call in a professional. Change the air filter. This video will show you where you should start with your furnace troubleshooting.

These diagnostic steps are for an air handler blower or furnace fan that just won t quit running. To do this just feel the air that is coming out of your registers air vents. When the fan is set to on it stays on until you shut it off. On the whole the temperature control switches cannot be adjusted and are to be changed if they are defective.

Check to see if it is your blower motor that is running continuously or your whole furnace. Electric furnaces pull air through a filter before it heats it. Thermostat temperature setting is too high. This safety mechanism protects your furnace from overheating and the damage that causes.

A dirty air filter blocks airflow over the furnace s heat exchanger causing it to overheat. If your furnace keeps blowing hot air and won t stop the furnace burners aren t turning off. Common causes of this problem. This hot then cold air sequence happens over and over and your home isn t warming up.

Here we explain where you can see.